Name of month not updated when firstDate and lastDate have changed

[veptune]

Hello,

My calendar is displaying well, with option self.calendarView.pinsHeaderToTop = YES;

I created my own button "Next month" "Previous button", it works, the calendar change, but the month's name in the header still the name (whatever the local i use)

-(IBAction) onClickButtonNextMonth
{
self.calendarView.firstDate = newDate;
self.calendarView.lastDate = newDate;
self.calendarView.selectedDate = newDate;

[self.calendarView scrollToDate:newDate animated:YES];

}